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Sub-replacement fertility, smaller younger cohorts, aging population and sharply reduced immigration are draining the long-run household formation that underpinned demand, creating regional oversupply risk even as national prices hold near highs.

June existing-home months' supply hit 4.6 while Census projects net migration near 321,000 in 2026 and household growth slowed to 1.1 million in 2025.

Why it matters: Affects mortgage rates, construction jobs, local property values, and the divergence between overbuilt Sun Belt markets and tighter Northeast and Midwest ones.

Date to watch: July 24, 2026 Census New Residential Sales release

Sources:

U.S. Census Bureau Vintage 2025 Random Samplings net international migration (2026-01-15)
https://www.census.gov/newsroom/blogs/random-samplings/2026/01/historic-decline-in-net-international-migration.html
CDC/NCHS National Vital Statistics Report 2024 final natality (2025-12-01)
https://www.cdc.gov/nchs/data/nvsr/nvsr75/nvsr75-02.pdf
U.S. Census Bureau New Residential Sales May 2026 (2026-06-24)
https://www.census.gov/construction/nrs/current/index.html
Mortgage Bankers Association white paper demographic trends housing demand (2026-06-22)
https://www.mba.org/news-and-research/newsroom/news/2026/06/22/mba-white-paper--demographic-trends-could-reshape-future-housing-demand
Harvard Joint Center for Housing Studies State of the Nation's Housing 2026 (2026-06-17)
https://www.jchs.harvard.edu/state-nations-housing-2026
National Association of Realtors Existing-Home Sales June 2026 (2026-07-09)
https://www.nar.realtor/research-and-statistics/housing-statistics/existing-home-sales
U.S. Census Bureau historical households tables (2026-01-01)
https://www.census.gov/data/tables/time-series/demo/families/households.html

The Throughline decodes today's headline — with receipts. Every claim is sourced; links below.
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